How can I get column names from a table in MySQL using PHP?
The following query will find the column names of a table in MySQL and return all the columns of the specified table. Use TABLE_SCHEMA to select the columns of a specific database table. The following code shows the complete process to get all the column names of a table using PHP and MySQL.
Table of Contents
How can I get a column from the database in PHP?
The fetch_field() / mysqli_fetch_field() function returns the next field (column) in the result set, as an object.
How can I get columns from a table in MySQL?
- DESC table_name.
- DESCRIBE table_name.
- SHOW COLUMNS FROM table_name.
- SHOW create table table_name;
- EXPLAIN table_name.
How do I see all the columns in a SQL table?
Using the information schema
- SELECT TABLE_NAME FROM SCHEME_INFORMATION. TABLES.
- SELECT TABLE_NAME, COLUMN_NAME FROM SCHEME_INFO. COLUMNS.
- SELECT COLUMN_NAME FROM SCHEME_INFO. COLUMNS WHERE TABLE_NAME = ‘Album’
- IF EXISTS (SELECT * FROM SCHEME_INFO.
- IF EXISTS (SELECT * FROM SCHEME_INFO.
What is the drawback of JSON columns in MySQL?
The inconvenient? If your JSON has multiple fields with the same key, only one of them, the last one, will be preserved. The other drawback is that MySQL doesn’t support JSON column indexing, which means searching your JSON documents could result in a full table scan.
Should I use JSON MySQL?
Since 5.7, MySQL now supports a JSON data type (in a binary storage format), and PostgreSQL JSONB has matured significantly. Important: If most of your schema is volatile enough to justify using JSON, you might want to at least consider whether a relational database is the right choice.
Which is not a JSON data type?
JSON values cannot be one of the following data types: a function. an appointment. undefined.